Lime Tree Gardens Soakaway (map)

This is the second time that I’ve come across a Flood Lagoon (the far-more-impressive first time was back on 20 June 2016 with the Carlton Foxhill Road Central Flood Prevention Lagoon. Thanks to lots of help provided on that First Contact, and after a phone call with Nav today (“my name is ‘Nav‘, like ‘SatNav’”) I’ve also got the inside skinny from Severn Trent on this one. And it is complicated…

There is a rectangle of grass (map) that encloses the whole thing:–

• landuse = grass

3 sides have a metre-high fence (map):–

• use menu: Highways|Barriers|Fence

The man-made structure that you can see in the centre of that photo above is two outlet pipes for a culvert that conducts surface water from the nearby estate’s roads into the soakaway:–

• use menu: Man Made|Man Made|Pipeline
  (I was far less sure of using this one)

I’m much more confident of the mapping with the Soakaway basin (map) itself, which is a roundish depression within the centre of the rectangle:–

• use menu: Water|Water|Basin
• basin = infiltration

At the other corner opposite to the culvert outlets is a pumping station (map). This is the only item that Severn Trent actually had named (“Mapperley Lime Tree Gardens Pumping Station”):–

I’m unsure on this one, too. It is a rectangle of concrete surrounded by a 2m metal fence. That was easy to map. Then it has water-pumping equipment inside. Do I map that separate or together? In the end, I combined both sets of mapping. The works are designed to pump excess water out of the basin and into the nearby ditch.

• use menu: Highway|Barriers|Fence
• use menu: Man Made|Man Made|Water Works

The final items are a hedge + a ditch + an outfall pipe (map) within the ditch (using essentially the identical mapping for the culvert as above):–

Update

I’ve made some small changes following the comment from lakedistrict:– the pumpingstation has been changed from man_made=water works to man_made=pumping_station + substance=wastewater. That does not form part of the JOSM menu system, but does fit better to this situation and is documented within the wiki.